== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:41:58 (1786192918)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.10623 s, 17.2 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9f300a7d8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.02885
Iter 1/10: OSS cache speed: 0.892655
Iter 1/10: ladvise speed: 0.930415
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.14996
Iter 2/10: OSS cache speed: 1.52645
Iter 2/10: ladvise speed: 1.42664
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.54044
Iter 3/10: OSS cache speed: 1.25792
Iter 3/10: ladvise speed: 1.51256
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.34893
Iter 4/10: OSS cache speed: 1.56938
Iter 4/10: ladvise speed: 1.55804
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.75361
Iter 5/10: OSS cache speed: 1.73007
Iter 5/10: ladvise speed: 2.00885
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.23537
Iter 6/10: OSS cache speed: 2.11227
Iter 6/10: ladvise speed: 2.08631
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.20388
Iter 7/10: OSS cache speed: 2.06986
Iter 7/10: ladvise speed: 2.15345
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.02267
Iter 8/10: OSS cache speed: 2.0427
Iter 8/10: ladvise speed: 2.01322
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.03255
Iter 9/10: OSS cache speed: 2.07229
Iter 9/10: ladvise speed: 2.21643
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.05386
Iter 10/10: OSS cache speed: 2.04624
Iter 10/10: ladvise speed: 2.26206
Average uncached read: 1.73
Average speedup with OSS cached read:  1.73 = +0%
Average speedup with ladvise willread:  1.81 = +4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0